2′-Hydroxy-fendiline analogues as potent relaxers of isolated arteries
摘要:
Novel, 2'-hydroxy derivatives of fendiline have been synthesised and their ability to induce relaxation of isolated rat small mesenteric and coronary arteries were determined. Both derivatives examined were significantly more potent as vasodilators than fendiline itself. Similar effects were observed on both mesenteric and coronary arteries. (c) 2007 Elsevier B.V. All rights reserved.
Metal-Free C–O Bond Functionalization: Catalytic Intramolecular and Intermolecular Benzylation of Arenes
作者:Luis Bering、Kirujan Jeyakumar、Andrey P. Antonchick
DOI:10.1021/acs.orglett.8b01495
日期:2018.7.6
conditions enabled a catalytic and metal-free Friedel–Craftsalkylation reaction with benzylic alcohols, producing water as the stoichiometric byproduct. A comprehensive scope (>50 examples) for both approaches and application in drug synthesis were demonstrated. Mechanistic studies suggest a Lewis acid-based mechanism for the metal-free Friedel–Crafts reaction.
Palladium catalyzed isomerization of alkenes: a pronounced influence of an o-phenol hydroxyl group
作者:Jinmin Fan、Changfeng Wan、Qiang Wang、Linfeng Gao、Xiaoqi Zheng、Zhiyong Wang
DOI:10.1039/b907426k
日期:——
A novel palladium catalyzed isomerization of alkenes has been found, where an ortho-phenol hydroxyl group has a pronounced influence on the isomerization.
已经发现了新型的钯催化的烯烃的异构化,其中邻苯酚羟基对异构化具有显着影响。
[4 + 2]-Cycloaddition and 1,4-Addition of <i>ortho</i>-Quinone Methides by a Chiral Crotyl Silane
作者:Christopher R. Wong、Gerald Hummel、Yongqi Cai、Scott E. Schaus、James S. Panek
DOI:10.1021/acs.orglett.8b03395
日期:2019.1.4
ortho-quinone methides (oQMs). The reaction produces both the chiral chroman and crotylation products in a ratio reflective of the electronic nature of the parent oQM with overall combined yields up to 96%. A ring-opening and elimination sequence was subsequently developed to provide direct access to the crotylation products, containing two contiguous tertiary carbon stereocenters, in good yields and enantioselectivities
hydrosilane [(EtO)3SiH] was revealed in the one-carbon migration and isomerization of 4,4-biaryl-substituted 1-butenes, in which the (EtO)3SiH plays a key role in the palladium-catalyzed one-carbon migration and subsequent isomerization of terminal alkenes. This catalytic protocol is applied in the synthesis of a key building block of cassumunin C in high yield and promising selectivity.
Ferrocenium Boronic Acid Catalyzed Deoxygenative Coupling of Alcohols with Carbon- and Nitrogen-Based Borate and Silane Nucleophiles
作者:Jake J. Blackner、Deirdre M. Rooney、Joshua W. Hollett、J. Adam McCubbin
DOI:10.1021/acs.joc.3c00463
日期:2023.7.7
yields, increased diversity of the alcohol substrate scope, and high E/Z selectivity. Furthermore, the reaction proceeds under mild conditions and yields up to 98%. Computationalstudies provide a rationalization for a mechanistic pathway for the retention of E/Z stereochemistry when E or Z alkenyl silanes are used as nucleophiles. This methodology is complementary to existing methodologies for deoxygenative